1 Samuel 24:3

https://www.biblegateway.com/passage/?search=+1+samuel+24%3A3&version=NET;NRSV;WEB

http://www.sermonindex.net/modules/newbb/viewtopic.php?topic_id=30268&forum=36

Weird OT: Euphemisms (‘Uncovering the Feet’)

https://en.wiktionary.org/wiki/cover_one%27s_feet

Ruth:

http://www.isitinthebible.com/ot/ruth&boaz.htm
https://hermeneutics.stackexchange.com/questions/1391/did-ruth-uncover-boaz-feet-or-something-else
http://biblehub.com/commentaries/ruth/3-4.htm

I saw something about Noah and his nakedness but it wasn’t really about uncovering and I cannot verify.